As a high-performance engineering plastic, Polyimide (PI) has become a key material in the aerospace field due to its high temperature resistance, radiation resistance, high mechanical strength and excellent electrical insulation. Initially developed for aerospace, it is now widely used in commercial aerospace.
     In terms of cable and wire insulation, its film can withstand extreme temperatures from -170°C to over 400°C, and its low outgassing property is suitable for vacuum environments. SpaceX's Starlink satellites use it to ensure the stable operation of antenna systems under extreme temperatures in space, reducing signal loss by 37%; the Boeing 787 Dreamliner applies it to electrical systems to reduce weight and improve fuel efficiency by 20%. In the field of thermal protection and heat insulation layers, it is stable at high temperatures, not easy to burn, and has low smoke emission, meeting aviation safety standards. The PMR-15 polyimide composite material developed by NASA is used in aircraft engine components to achieve light weight and high heat resistance, reducing weight and processing costs.
    In terms of structural components, its carbon fiber composite materials are used in non-load-bearing parts such as aircraft fuselages and satellite casings, and APICAL® polyimide film also provides wear-resistant and cut-resistant protection. In addition, it is also used in satellite radiation shielding, flexible circuits of spacecraft and aviation tapes, promoting more efficient and safe space exploration and air travel. With the development of companies such as SpaceX, its role will become more critical.

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